Flushing device.



C. E. COCHRANEJ FLUSHING DEVICEr APPLICATION FILED MAR.25.19|6..

Patented Oct. 16, 1917.

Charles E. @vchwawe;

Fitlitliil.

CHARLES E. COCHRANE, OF LIEDFOBD, MASSACHUSETTS, ASSIGNOR TO Ci-D er. MANU- FACTUB/INGCOMPANY, OF PORTLAND, MAINE, A. CORPORATION OF MAINE.

:FLUSHING DEVICE.

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- Specification of Letters Patent. Patgntgd 8 1 ,16 1917 Application filed March 25, 1916. Serial No. 86,542.

To ull'whom may] concern.

Beit known thatI, CHARLES E. Coon:- BANE, a citizen of the Unit'ed States, and a resident of Medford, in the county of Mid- (llesex and Commonwealth of Massachusetts, have invented certain new and useful I111- provements in FlushinglDevices, of which the following is a full, clear, and exact specification.

The object of the present invention is'to construct a water closet with what is conventionally known in the trade as a lowdown flush tank operated by a siphon. Hitherto water closets having what is conventionally known to the trade as high flush tanks with siphons have been in successful use, but when the ordinary siphon was applied in a low-down fiush tank the long leg of the siphon was necessarily so near the length of the short leg and so large as to render siphon action impossible and was thus unsuccessful. In the high tank the efiiciency of the flushing depends largely upon the force or pressure of the descending water. In the low tank it depends upon the volume. Consequently the discharge pipe in the low tank must be larger than that in the high tank. In the latter case siphon action is more difficult to attain and maintain.

Applicant has made a first successful water closet having a low flush tank and siphon. To accomplish this he has constructed that portion of the long leg of the siphon which is positioned within the tank with water-flow retarding means, which while they do not prevent the flow of the liquid through the siphon, do retard its flow, or in other words, he has lengthened the long leg of the siphon by making bends or contractions or both in the part located in the tank until it is sufficient to permit siphon action with a sufficient flow to thoroughly flush the closet, thus accomplishing what has long been sought without success.

In the drawing herewith accompanying and forming a part of this application Figure 1 is a perspective view of a water closet and a low flush tank having my improve ments applied thereto, and Fig. 2 is a sectional elevation of a portion of the same showing my improved siphon construction.

The same reference characters indicate like parts in the several figures.

In said drawings 1 designates a bowl, 2 a low water tank, 8 a supply pipe and a float controllingthe intake. These maybe of any usualform and separately form no part'ofmy invention.

In Fig. 2 I have shown one embodiment of my invention. In a low tank 2 I place asiphon having a short leg6 terminating at a point near the bottom "of the tank and extending a suitable distance and bent over opening into a longleg 7 which discharges into the bowl. The long leg is so constructed that its length is greater from its juncture with the short leg than the distance from that point to the bottom of the tank. I have shown one method of attaining this result. The long leg has two oppositely extending offsets therein, one near the top and one near the bottom of the tank. This structure not only increases the length of the long leg, but also has the additional advantage of somewhat retarding the flow of the liquid through the long leg, because it projects the liquid against more or less horizontal surfaces. These retarding surfaces also act as splashing surfaces, which spray the descending column of water, more completely filling the long leg and thereby expelling the air from the long leg. The long leg has also somewhat less capacity than the short leg, thus still further retarding the flow from the short leg and thereby aiding siphon action.

I have shown in the drawings one method of supplying the flush tank with water and one method of starting siphon action, but any convenient means may be employed for these purposes. The main supply pipe 3 which furnishes the water for the tank has a branch pipe 9 which terminates in the tank and directly under the short leg of the siphon. This branch pipe is supplied with a valve 11 and a valve operating handle 12. When the valve is opened a jet of water under pressure is forced into the open end of the short leg of the siphon which causes the water to rise and overflow into the long leg and thus start siphon action.

The bowl may be provided with a retarding chamber 20 into which the long leg of the siphon discharges and extending out of said chamber 20 is a small air pipe 21 which extends upwardly to a point above the water line of the flush tank. When the water descends into chamber 20 from the siphon the retarding air escapes from the chamber through pipe, thus easing; the flow of water into the water sealed retarding cham-' ber, also obviating any danger of 0verfiovving the tank in case of accident and also preventing continuous siphon action. 7

I claim: I

1. In a device of the character described, a water closet bowl, a 10W flush tank, acloset flushing siphon located in the tank and pro vided with flow retarding means, an air tube communicating with said closet and ter minating above the Water lineof the tank and means for starting siphon action.

2. In a device of the character described, a Water closet vbowl, a low flush tank, a siphon located in the tank and provided with flow retarding means an air tube extending from a point in the long leg belowthe Copies of this'patent may be obtained for level oi, the end of the short leg to a point above the water level of the tank and means for starting siphon action.

3. In a device of the character described, the combination with a water closet having a retarding chamber, a low flush tank and a closet flushing siphon within the tank, of

an air pipe communicating with said retardlng chamber and termlnatlng above the water line of thetank.

In testimony that I claimthe foregoing invention, I have hereunto set my hand this 17th day of March,'l 9l6.

I CHARLES E. OOOHRANE. Witness: I

A. B. UPHAM.

five cents each by witnessing the commissioner of Patents,

- WashingtomD. 0.? I 

